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Enhance libi3 and use it in i3bar.

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Abstracted draw_text and predict_text_width into libi3. Use
predict_text_width from libi3 in i3 too. This required tracking
xcb_connection in a xcb_connection_t *conn variable that libi3
expects to be available in i3bar.
This commit is contained in:
Fernando Tarlá Cardoso Lemos
2011-11-13 17:19:42 -02:00
committed by Michael Stapelberg
parent 70151ea238
commit 5c2088c87e
11 changed files with 307 additions and 262 deletions
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4
i3bar/src/workspaces.c
View File

@ -124,8 +124,8 @@ static int workspaces_string_cb(void *params_, const unsigned char *val, unsigne
params->workspaces_walk->ucs2_name = ucs2_name;
params->workspaces_walk->name_glyphs = ucs2_len;
params->workspaces_walk->name_width =
predict_text_extents(params->workspaces_walk->ucs2_name,
params->workspaces_walk->name_glyphs);
predict_text_width((char *)params->workspaces_walk->ucs2_name,
params->workspaces_walk->name_glyphs, true);
DLOG("Got Workspace %s, name_width: %d, glyphs: %d\n",
params->workspaces_walk->name,

185
i3bar/src/xcb.c
View File

@ -48,12 +48,12 @@ xcb_connection_t *xcb_connection;
int screen;
xcb_screen_t *xcb_screen;
xcb_window_t xcb_root;
xcb_font_t xcb_font;
/* We need to cache some data to speed up text-width-prediction */
xcb_query_font_reply_t *font_info;
int font_height;
xcb_charinfo_t *font_table;
/* This is needed for integration with libi3 */
xcb_connection_t *conn;
/* The font we'll use */
static i3Font font;
/* These are only relevant for XKB, which we only need for grabbing modifiers */
Display *xkb_dpy;
@ -99,75 +99,6 @@ int _xcb_request_failed(xcb_void_cookie_t cookie, char *err_msg, int line) {
return 0;
}
/*
* Predicts the length of text based on cached data.
* The string has to be encoded in ucs2 and glyph_len has to be the length
* of the string (in glyphs).
*
*/
uint32_t predict_text_extents(xcb_char2b_t *text, uint32_t length) {
/* If we don't have per-character data, return the maximum width */
if (font_table == NULL) {
return (font_info->max_bounds.character_width * length);
}
uint32_t width = 0;
uint32_t i;
for (i = 0; i < length; i++) {
xcb_charinfo_t *info;
int row = text[i].byte1;
int col = text[i].byte2;
if (row < font_info->min_byte1 || row > font_info->max_byte1 ||
col < font_info->min_char_or_byte2 || col > font_info->max_char_or_byte2) {
continue;
}
/* Don't you ask me, how this one works… */
info = &font_table[((row - font_info->min_byte1) *
(font_info->max_char_or_byte2 - font_info->min_char_or_byte2 + 1)) +
(col - font_info->min_char_or_byte2)];
if (info->character_width != 0 ||
(info->right_side_bearing |
info->left_side_bearing |
info->ascent |
info->descent) != 0) {
width += info->character_width;
}
}
return width;
}
/*
* Draws text given in UCS-2-encoding to a given drawable and position
*
*/
void draw_text(xcb_drawable_t drawable, xcb_gcontext_t ctx, int16_t x, int16_t y,
xcb_char2b_t *text, uint32_t glyph_count) {
int offset = 0;
int16_t pos_x = x;
int16_t font_ascent = font_info->font_ascent;
while (glyph_count > 0) {
uint8_t chunk_size = MIN(255, glyph_count);
uint32_t chunk_width = predict_text_extents(text + offset, chunk_size);
xcb_image_text_16(xcb_connection,
chunk_size,
drawable,
ctx,
pos_x, y + font_ascent,
text + offset);
offset += chunk_size;
pos_x += chunk_width;
glyph_count -= chunk_size;
}
}
/*
* Redraws the statusline to the buffer
*
@ -181,16 +112,16 @@ void refresh_statusline() {
xcb_char2b_t *text = (xcb_char2b_t*) convert_utf8_to_ucs2(statusline, &glyph_count);
uint32_t old_statusline_width = statusline_width;
statusline_width = predict_text_extents(text, glyph_count);
statusline_width = predict_text_width((char*)text, glyph_count, true);
/* If the statusline is bigger than our screen we need to make sure that
* the pixmap provides enough space, so re-allocate if the width grew */
if (statusline_width > xcb_screen->width_in_pixels &&
statusline_width > old_statusline_width)
realloc_sl_buffer();
xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font_height };
xcb_rectangle_t rect = { 0, 0, xcb_screen->width_in_pixels, font.height };
xcb_poly_fill_rectangle(xcb_connection, statusline_pm, statusline_clear, 1, &rect);
draw_text(statusline_pm, statusline_ctx, 0, 0, text, glyph_count);
draw_text((char*)text, glyph_count, true, statusline_pm, statusline_ctx, 0, 0);
FREE(text);
}
@ -242,9 +173,9 @@ void unhide_bars() {
values[0] = walk->rect.x;
if (config.position == POS_TOP)
values[1] = walk->rect.y;
else values[1] = walk->rect.y + walk->rect.h - font_height - 6;
else values[1] = walk->rect.y + walk->rect.h - font.height - 6;
values[2] = walk->rect.w;
values[3] = font_height + 6;
values[3] = font.height + 6;
values[4] = XCB_STACK_MODE_ABOVE;
DLOG("Reconfiguring Window for output %s to %d,%d\n", walk->name, values[0], values[1]);
cookie = xcb_configure_window_checked(xcb_connection,
@ -378,8 +309,8 @@ static void configure_trayclients() {
clients++;
DLOG("Configuring tray window %08x to x=%d\n",
trayclient->win, output->rect.w - (clients * (font_height + 2)));
uint32_t x = output->rect.w - (clients * (font_height + 2));
trayclient->win, output->rect.w - (clients * (font.height + 2)));
uint32_t x = output->rect.w - (clients * (font.height + 2));
xcb_configure_window(xcb_connection,
trayclient->win,
XCB_CONFIG_WINDOW_X,
@ -465,7 +396,7 @@ static void handle_client_message(xcb_client_message_event_t* event) {
xcb_reparent_window(xcb_connection,
client,
output->bar,
output->rect.w - font_height - 2,
output->rect.w - font.height - 2,
2);
/* We reconfigure the window to use a reasonable size. The systray
* specification explicitly says:
@ -473,8 +404,8 @@ static void handle_client_message(xcb_client_message_event_t* event) {
* should do their best to cope with any size effectively
*/
mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
values[0] = font_height;
values[1] = font_height;
values[0] = font.height;
values[1] = font.height;
xcb_configure_window(xcb_connection,
client,
mask,
@ -649,10 +580,10 @@ static void handle_configure_request(xcb_configure_request_event_t *event) {
continue;
xcb_rectangle_t rect;
rect.x = output->rect.w - (clients * (font_height + 2));
rect.x = output->rect.w - (clients * (font.height + 2));
rect.y = 2;
rect.width = font_height;
rect.height = font_height;
rect.width = font.height;
rect.height = font.height;
DLOG("This is a tray window. x = %d\n", rect.x);
fake_configure_notify(xcb_connection, rect, event->window, 0);
@ -778,6 +709,7 @@ char *init_xcb_early() {
ELOG("Cannot open display\n");
exit(EXIT_FAILURE);
}
conn = xcb_connection;
DLOG("Connected to xcb\n");
/* We have to request the atoms we need */
@ -869,29 +801,16 @@ char *init_xcb_early() {
*
*/
void init_xcb_late(char *fontname) {
if (fontname == NULL) {
/* XXX: font fallback to 'misc' like i3 does it would be good. */
if (fontname == NULL)
fontname = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
}
/* We load and allocate the font */
xcb_font = xcb_generate_id(xcb_connection);
xcb_void_cookie_t open_font_cookie;
open_font_cookie = xcb_open_font_checked(xcb_connection,
xcb_font,
strlen(fontname),
fontname);
/* Load the font */
font = load_font(fontname, true);
set_font(&font);
DLOG("Calculated Font-height: %d\n", font.height);
/* We need to save info about the font, because we need the font's height and
* information about the width of characters */
xcb_query_font_cookie_t query_font_cookie;
query_font_cookie = xcb_query_font(xcb_connection,
xcb_font);
xcb_change_gc(xcb_connection,
statusline_ctx,
XCB_GC_FONT,
(uint32_t[]){ xcb_font });
/* Set the font in the gc */
xcb_change_gc(xcb_connection, statusline_ctx, XCB_GC_FONT, (uint32_t[]){ font.id });
xcb_flush(xcb_connection);
@ -936,25 +855,6 @@ void init_xcb_late(char *fontname) {
ev_io_start(main_loop, xkb_io);
XFlush(xkb_dpy);
}
/* Now we save the font-infos */
font_info = xcb_query_font_reply(xcb_connection,
query_font_cookie,
NULL);
if (xcb_request_failed(open_font_cookie, "Could not open font")) {
exit(EXIT_FAILURE);
}
font_height = font_info->font_ascent + font_info->font_descent;
if (xcb_query_font_char_infos_length(font_info) == 0) {
font_table = NULL;
} else {
font_table = xcb_query_font_char_infos(font_info);
}
DLOG("Calculated Font-height: %d\n", font_height);
}
/*
@ -1084,7 +984,6 @@ void clean_xcb() {
FREE(xcb_chk);
FREE(xcb_prep);
FREE(xcb_io);
FREE(font_info);
}
/*
@ -1137,7 +1036,7 @@ void realloc_sl_buffer() {
xcb_screen->height_in_pixels);
uint32_t mask = XCB_GC_FOREGROUND;
uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, xcb_font };
uint32_t vals[3] = { colors.bar_bg, colors.bar_bg, font.id };
xcb_free_gc(xcb_connection, statusline_clear);
statusline_clear = xcb_generate_id(xcb_connection);
xcb_void_cookie_t clear_ctx_cookie = xcb_create_gc_checked(xcb_connection,
@ -1207,8 +1106,8 @@ void reconfig_windows() {
xcb_screen->root_depth,
walk->bar,
xcb_root,
walk->rect.x, walk->rect.y + walk->rect.h - font_height - 6,
walk->rect.w, font_height + 6,
walk->rect.x, walk->rect.y + walk->rect.h - font.height - 6,
walk->rect.w, font.height + 6,
1,
XCB_WINDOW_CLASS_INPUT_OUTPUT,
xcb_screen->root_visual,
@ -1282,12 +1181,12 @@ void reconfig_windows() {
case POS_NONE:
break;
case POS_TOP:
strut_partial.top = font_height + 6;
strut_partial.top = font.height + 6;
strut_partial.top_start_x = walk->rect.x;
strut_partial.top_end_x = walk->rect.x + walk->rect.w;
break;
case POS_BOT:
strut_partial.bottom = font_height + 6;
strut_partial.bottom = font.height + 6;
strut_partial.bottom_start_x = walk->rect.x;
strut_partial.bottom_end_x = walk->rect.x + walk->rect.w;
break;
@ -1305,7 +1204,7 @@ void reconfig_windows() {
* with which we draw to them) */
walk->bargc = xcb_generate_id(xcb_connection);
mask = XCB_GC_FONT;
values[0] = xcb_font;
values[0] = font.id;
xcb_void_cookie_t gc_cookie = xcb_create_gc_checked(xcb_connection,
walk->bargc,
walk->bar,
@ -1343,9 +1242,9 @@ void reconfig_windows() {
XCB_CONFIG_WINDOW_HEIGHT |
XCB_CONFIG_WINDOW_STACK_MODE;
values[0] = walk->rect.x;
values[1] = walk->rect.y + walk->rect.h - font_height - 6;
values[1] = walk->rect.y + walk->rect.h - font.height - 6;
values[2] = walk->rect.w;
values[3] = font_height + 6;
values[3] = font.height + 6;
values[4] = XCB_STACK_MODE_ABOVE;
DLOG("Destroying buffer for output %s", walk->name);
@ -1401,7 +1300,7 @@ void draw_bars() {
outputs_walk->bargc,
XCB_GC_FOREGROUND,
&color);
xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font_height + 6 };
xcb_rectangle_t rect = { 0, 0, outputs_walk->rect.w, font.height + 6 };
xcb_poly_fill_rectangle(xcb_connection,
outputs_walk->buffer,
outputs_walk->bargc,
@ -1422,7 +1321,7 @@ void draw_bars() {
/* We assume the tray icons are quadratic (we use the font
* *height* as *width* of the icons) because we configured them
* like this. */
traypx += font_height + 2;
traypx += font.height + 2;
}
/* Add 2px of padding if there are any tray icons */
if (traypx > 0)
@ -1433,7 +1332,7 @@ void draw_bars() {
outputs_walk->bargc,
MAX(0, (int16_t)(statusline_width - outputs_walk->rect.w + 4)), 0,
MAX(0, (int16_t)(outputs_walk->rect.w - statusline_width - traypx - 4)), 3,
MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font_height);
MIN(outputs_walk->rect.w - traypx - 4, statusline_width), font.height);
}
if (config.disable_ws) {
@ -1467,7 +1366,7 @@ void draw_bars() {
outputs_walk->bargc,
mask,
vals);
xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font_height + 4 };
xcb_rectangle_t rect = { i + 1, 1, ws_walk->name_width + 8, font.height + 4 };
xcb_poly_fill_rectangle(xcb_connection,
outputs_walk->buffer,
outputs_walk->bargc,
@ -1477,12 +1376,8 @@ void draw_bars() {
outputs_walk->bargc,
XCB_GC_FOREGROUND,
&fg_color);
xcb_image_text_16(xcb_connection,
ws_walk->name_glyphs,
outputs_walk->buffer,
outputs_walk->bargc,
i + 5, font_info->font_ascent + 2,
ws_walk->ucs2_name);
draw_text((char*)ws_walk->ucs2_name, ws_walk->name_glyphs, true,
outputs_walk->buffer, outputs_walk->bargc, i + 5, 2);
i += 10 + ws_walk->name_width;
}